Combined Low Salinity Brine Injection and Surfactant Flooding in Mixed−Wet Sandstone Cores

Autor:	Arne Skauge, Edin Alagic
Rok vydání:	2010
Předmět:	Chromatography Oil in place Chemistry General Chemical Engineering Energy Engineering and Power Technology Soil science Salinity Surface tension Fuel Technology Adsorption Pulmonary surfactant Microemulsion Enhanced oil recovery Solubility
Zdroj:	Energy & Fuels. 24:3551-3559
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef1000908
Popis:	The concept of surfactant flooding has long been recognized as a promising supplement to water-based enhanced oil recovery methods. In recent years, core displacement experiments performed on clastic rock samples using low salinity brine as injection fluid have proven to give a moderate increase in crude oil recovery. This paper presents a new hybrid EOR process where the effect of low salinity brine injection is combined with surfactant flooding. An anionic surfactant formulation was selected to give low interfacial tension (IFT) in a low salinity environment containing 0.50 wt % NaCl. The surfactant forms Winsor type I microemulsion at this salinity. Improved surfactant solubility and reduced adsorption or retention is among the advantages of using surfactant at low salinity conditions. This paper reports core flood experiments performed on outcrop sandstone cores using crude oil as the oil phase. Results show high oil recovery of more than 90% of original oil in place (OOIP) when surfactant is used in ...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b2adf33457c40a525ec7158082bb013f https://doi.org/10.1021/ef1000908 Zobrazit plný text záznamu